合成润滑脂用高碱值磺酸钙的研制

DEVELOPMENT OF OVERBASED CALCIUM SULFONATE FOR SYNTHETIC GREASE

以5种烷基苯磺酸A,B,C,D,E为原料合成高碱值磺酸钙,并进一步合成润滑脂。结果发现,由C、D合成的磺酸钙转化成的润滑脂性能较好。设计正交试验,考察C、D合成磺酸钙时促进剂、助促进剂、水、二氧化碳等因素的影响,得到优化的工艺条件。在50L反应器中进行中型放大试验,得到合格产品。其中以C为原料的磺酸钙碱值为396.1mgKOH/g,100℃运动黏度为134.28mm2/s,以D为原料的磺酸钙碱值为391.6mgKOH/g,100℃运动黏度为92.27mm2/s,二者的碳酸钙均为无定形结构。以上两种磺酸钙进行润滑脂中型试验时发现,磺酸钙转化为润滑脂的时间短、成脂性好,润滑脂高温性能及抗水性能好,其它性能均满足产品指标要求。

5 types of alkyl benzene sulfonic acids（A,B,C,D,E） were used to synthesize overbased sulfonates which were further to be used to prepare sulfonate grease.Test results indicated that sulfonate grease samples prepared by calucium sulfonates Ca-C and Ca-D（from sulfonic acids C and D,respectively） exhibited better performance as compared with the others.Orthogonal experiments were designed to investigate the influence of promoter amount,co-promoter,water and carbon dioxide on the properties of calucium sulfonates,and to obtain the optimum preparation conditions.Based on these results,overbased sulfonates Ca-C and Ca-D were prepared in 50 L pilot plant reactor,the TBN of prepared Ca-C and Ca-D was 396.1 mgKOH/g and 391.6 mgKOH/g,respectively;their 100 ℃ kinetic viscosities were 134.28 mm2/s and 92.27 mm2/s,respectively,and both having amorphous carbonate.Finally,two sulfonate grease products were prepared by calucium sulfonates Ca-C and Ca-D in pilot plant scale,it was observed that the conversion of calucium sulfonates Ca-C/Ca-D to synthetic grease could be completed in short time.The qualities of these two products met the requirements of relative product specifications,and they exhibited good performance at high temperature,as well as resistant to water.